Begin the lesson by introducing the concept of matter and its three states: solids, liquids, and gases. Highlight that today's focus will be on solids.

Engage students by asking them to identify solid objects around the classroom and discuss their characteristics.

Explain the characteristics of solids, emphasizing that they have a definite shape and size. Use examples like pencils and books.

Watch the video 'Does changing the shape of solid matter affect its mass?' to reinforce the concept that solids maintain their mass regardless of shape changes.

Guide students through a discussion on how solids differ from liquids and gases. Use classroom objects as examples.

Watch the video 'Comparing Masses of Objects with Different Volumes' to understand the relationship between mass and volume in solids.

Conduct a classification activity where students sort classroom objects into solid, liquid, and gas categories.

Use the 'Sorting Matter' assessment to reinforce the concept of categorizing matter based on its state.

Have students individually identify and list solid objects they find at home, describing their characteristics.

Use the 'What Is Matter?' assessment to evaluate students' understanding of matter and its properties.

Conduct a class discussion to review what students have learned about solids and their properties.

Encourage students to reflect on how the knowledge of solids applies to everyday life.

Administer the 'Solids and Liquids' assessment to test students' understanding of the differences between these states of matter.

Encourage students to explore further by watching the 'Lighthouse Lab – Matter' video, which provides a comprehensive overview of matter and its states.